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We have graded using the new scale 16 copies taken randomly. The mean of those 16 copies is 10.5 out of 20 and the standard

We have graded using the new scale 16 copies taken randomly. The mean of those 16 copies is 10.5 out of 20 and the standard deviation is 2.3. Can we say that the mean of the test of physics-chemistry of bac S will be higher than 10? With what risk of error?

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